45% of 80?

45% 0f 80
= (45/100) *80
=(9/20)*80
=9*4
=36 ans
45% means 45/100 i,e out of 100

= 0.45(80)
= 36

Answer: 36 is 45% of 80.

Changing percent to fraction:
Percent over (/) 100 and drop the % sign.

Percent to decimal:
Divide the percent by 100 and drop the % sign:
Example: %/100% = decimal

Fraction to decimal:
Divide the numerator by the denominator.
Example: numerator/denominator = decimal

Fractions to percent:
Multiply the numerator by 100 over denominator and affix the % sign, i.e., (numerator * 100)/denominator%

100%<----->80

10%<-------> 8
20%<------->16

40%<------->32
5%<--------> 4

45%<------>36

=>80 x 45%
= 80 x 45/100
= 80 x 9/20
= 720/20
= 36

45/100 = x/80 , then cross multiply and find x

Another method is to remember that all percentages can be converted to 2-space decimals. One percent is .01, ten percent is .10, and forty-five percent would be .45.

80 times .45 produces the same answer as the fraction method, so use whichever one you're more comfortable with.

45% x 80
= 45/100 x 80
= 9/20 x 80
= 9 x 4
= 36

80 x 45%
= 80 x 45/100
= 80 x 9/20
= 720/20
= 36

45% of 80

40% =80/10 =8(10%) times 4=32
+ 5%, =80/10=8(10%) divided by 2=4
32+4=36

some notes on converting fraction to decimals and %%'s

1/4 = 100/4 =25% = 0.25
4/3=100/4*3=75%=0.75
1/8= 100/8=12.5%=0.125"""
7/8=100/8*7=87.5%=0.875
1/10= 100/10= 10%=0.10""
""9/10=100/10=90%=0.90
9/8 is top heavy fraction so 1 1/8= 100%
+12.5%=112.5%
= 1.125
37 1/3% of 49 Type in calculator
49/100 times 37.3=

44 1/6% 0f 441 type for example
441/100 times 44.6

The answer is 36.
To solve this first change the percentage to a decimal by moving the decimal point two places to the left. Next multiply 80 by the new decimal .45 you get 36.

In response to your other question, you change a percent to a fraction by writing it over 100, for example, 38% as a fraction would be 38/100 then you can find a common factor and reduce, in this case 19/50.

To change a fraction to a decimal simply divide the numerator (top) by the denominator (bottom), for example 2/5 would be .4 because 2 divided by 5 is .4

To change a fraction to a percentage you need to change the denominator too 100, for example if you had 6/25 you would need to multiply numerator and denominator by 4 to make the denominator 100, you would get 24/100 or 24%

To change a percent to a decimal just move the decimal point over two spaces to the left (like I did to solve your initial question.) For example 28% would be .28

Hope this helps!